The Human Resources Manager,
__________ (Company’s name)
__________ (Company’s Address)
Date: __/__/____ (Date)
Subject: Request to defer joining date
My name is __________ (name) and I am writing this letter in regard to the offer letter with reference number ____________ (mention) that I received from your company/ organisation/ institute for the post of __________ (mention post you were offered).
This is to most humbly inform you that as mentioned in the offer letter, I had to join my duties from __/__/_____ (mention date) onwards but due to unavoidable circumstances, I will not be able to join duty on the mentioned date. Therefore, it is to request you to kindly consider this letter as a request for allowing me to join the duty from __/__/_____ (mention date) onwards.
I shall be highly obliged for your kind consideration and believe in hearing back from you. In case you have any queries, you may contact me on the contact details mentioned at the end of this letter.
________ (Contact Number),
________ (Email Address)